When you try to patch Rollercoaster Tycoon 3 you might encounter the following error:

Cannot locate RCT3 USA, RETAIL, on your computer

If you get this error when trying to install a Rollercoaster Tycoon 3 patch you have downloaded a damaged patch, OR one for the wrong region (don’t feel bad, it seems they are quite commonly mislabelled).

At this point you have two options. You can either use the autopatcher from the start menu shortcut “Check for Updates” OR if this fails, patch manually. To properly manually patch your game follow the steps appropriate to your region. Note the following patches should only be installed if you do not have any expansions installed.

Install EU update 2. If you have the EU version of the game you only have to patch directly from retail the latest version (update 2)retail – update 2

There is a very comprehensive post on patching vanilla RCT3 that you can find here. If you have any issues updating the game, please post any error messages, your game version and your region in the comments below.